<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Promise.reject</title>
</head>
<body>
  <script>
    let p = Promise.reject(3);

    setTimeout(console.log, 0, p);  // Promise <rejected>: 3

    p.then(null, err => setTimeout(console.log, 0, err));  // 3
  </script>
</body>
</html>